Angling apparatus (20) includes an immersible sensing device (22, 50, 80, 90, 100), which is configured for attachment to a distal end of a fishing line (26) and contains one or more sensors (32, 34, 70, 73) and a wireless communication interface (62) coupled to transmit signals indicative of an output of the one or more sensors. In one embodiment, an antenna (38) has a first end connected to receive signals from the wireless communication interface, and which is configured to be attached collinearly to the fishing line so that while the sensing device is immersed below a surface of a body of water, a second end of the linear antenna, opposite the first end, protrudes above the surface in order to transmit the signals.
